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Finding the Fourth Proportional to 342.58, 514.10 and 126.18

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Solution

The fourth proportional to 342.58, 514.10 and 126.18 is: 189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.58 : 514.10 = 126.18 : x
  2. Step 2: Convert to fraction form
    342.58/514.10 = 126.18/x
  3. Step 3: Cross multiply
    342.58x = 514.10 × 126.18
  4. Step 4: Simplify right side
    342.58x = 64,869.14
  5. Step 5: Solve for x
    x = 64,869.14/342.58
  6. Step 6: Final answer
    x = 189.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.